[A89] Undocumented Flags

To: assembly-89@lists.ticalc.org
Subject: [A89] Undocumented Flags
From: Bart <trzy@mailandnews.com>
Date: Sun, 01 Jul 2001 12:06:54 -0700
Reply-To: assembly-89@lists.ticalc.org


Hello,

A couple days ago I released a document on undocumented 68K flags. Check it
out: http://trzy.overclocked.org/ under "Microprocessor Programming."
There's also a document there which shows how often instructions are used
(results were obtained by profiling 29 Sega Genesis games with my emulator,
Genital.)

My undocumented flag findings were verified against a real MC68EC000. Does
anyone know of any other documentation on this topic? I would like to
verify that my findings were correct for the CHK undocumented flags (I
think C and V are always cleared), and perhaps make sure that my
ABCD/NBCD/SBCD V flag description is correct as well.



Bart

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